Firefox 13 Beta 1

NEWWhen opening a new
tab, users are now presented with their most visited pagesNEWThe default home page now has
quicker access to bookmarks, history, settings, and moreCHANGEDSPDY protocol now enabled by
default for faster browsing on supported sitesCHANGEDRestored background tabs are not loaded
by default for faster startupCHANGEDSmooth scrolling is now enabled by
defaultDEVELOPER72 total improvements to Page Inspector, HTML panel, Style Inspector,
Scratchpad and Style EditorDEVELOPERThe column-fill CSS property has been
implementedDEVELOPERExperimental support for ECMAScript 6 Map and Set objects has been
implementedDEVELOPERSupport for the CSS3 background-position property extended syntax has
been addedDEVELOPERThe :invalid pseudo-class can now be applied to the
elementDEVELOPERThe CSS turn <angle> unit is now supported

Known
Issues

UNRESOLVEDIf you try to start Firefox using a locked profile, it will crash (see
573369)UNRESOLVEDFor some users, scrolling in the main GMail window will be slower than
usual (see 579260)UNRESOLVEDSome synaptic touch pads are unable to vertical scroll (see
622410)UNRESOLVEDWindows: The use of Microsoft´s System Restore functionality shortly after
updating Firefox may prevent future updates (see 730285)